After reutrning from a two week hiatus, CSI returns with an episode that goes 'up in smoke.'

"Up in Smoke," which airs tomorrow, has been described as the following:

The CSIs determine that the body they have found was burned before it was dumped down the chimney, leading
them to believe the murder was pre-meditated. During the processing of the home, Catherine and Warrick realize that this is
the same address of an unsolved homicide of a young female teenager from a year ago, and re-open the investigation.